@waarismijnhoofd
The answer: it depends on the country.
In the US, unlike other countries, we have statutory and legal (case law) exceptions to ....
1. The act of copying/digitizing
2. The act of uploading
3. The act of sharing.
Ex: someone makes a copy of a movie, uploads it to Youtube. If Youtube receives a notice from the copyright owner and takes it down, they are protected. This is what the Internet Archive does and has done.
In the US, decrypting the copyright protections is illegal - but the US copyright allows exceptions for many uses (the blind, education, certain creators).
Finally, there is the general and broad "fair use" which is the right to copy and share and even transform/use material for commentary, education, and other uses. This is decided on a case by case basis.
In the publishers case the Internet Archive argued that the "digitizing and then controlled lending" of a paper book they legally owned = fair use. The Court disagreed. There will be an appeal.